I have this Ford 100 built by Jac. that I bought for parts and have decided to rebuild it and I am not getting fire the engine. The ing. swictch was missing and I bought one the had the same pkug set up so I could just plug it in and not have to rewire it. Well that did not worlk real well as it was wired wrong and no fire to engine or starter. The new switch has 3 prongs 1 marked B, 1 marked S, and 1 marked M. The wiring diagram I have showss 1 B,1 S, 1 I.
Is this my problem do I have the wrong kind of switch?
I am not an electrisal man and can afford to take this one to the shop as I am still reeling from the cost of getting the LGT 165 running.

You do have the wrong kind of switch. The switch you bought is for magneto ignition, and according to your wiring diagram, you need a switch for battery ignition.

Thanks I got a proper one and it fired right up. I told the parts man I was lerning so much about theses tractors, by the time I got the ones I already have going I would be the smartest guy in town.lol